please asnwer also do I use rate of return or prime rate?

Given the following information, calculate the net present value: Initial outlay is $50,000; required rate of return is 10%; current prime rate is 12%; and cash inflows for the next 4 years are $60,000, $30,000, $40,000, and $50,000. $87.734 $93.542 equal to $0 less than $0